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Resveratrol modulates GSH system in C6 astroglial cells through heme oxygenase 1 pathway

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Abstract

Resveratrol is a dietary polyphenol that displays neuroprotective properties in several in vivo and in vitro experimental models, by modulating oxidative and inflammatory responses. Glutathione (GSH) is a key antioxidant in the central nervous system (CNS) that modulates several cellular processes, and its depletion is associated with oxidative stress and inflammation. Therefore, this study sought to investigate the protective effects of resveratrol against GSH depletion pharmacologically induced by buthionine sulfoximine (BSO) in C6 astroglial cells, as well as its underlying cellular mechanisms. BSO exposure resulted in several detrimental effects, decreasing glutamate-cysteine ligase (GCL) activity, cystine uptake, GSH intracellular content and the activities of the antioxidant enzymes glutathione peroxidase (GPx) and glutathione reductase (GR). Moreover, BSO increased reactive oxygen/nitrogen species (ROS/RNS) levels and pro-inflammatory cytokine release. Resveratrol prevented these effects by protecting astroglial cells against BSO-induced cytotoxicity, by modulating oxidative and inflammatory responses. Additionally, we observed that pharmacological inhibition of heme oxygenase 1 (HO-1), an essential cellular defense against oxidative and inflammatory injuries, abolished all the protective effects of resveratrol. These observations suggest HO-1 pathway as a cellular effector in the mechanism by which resveratrol protects astroglial cells against GSH depletion, a condition that may be associated to neurodegenerative diseases.

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Acknowledgements

This study was supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS), Financiadora de Estudos e Projetos (FINEP)-Instituto Brasileiro de Neurociências (IBN Net) 01.06.0842-00, and Universidade Federal do Rio Grande do Sul and Instituto Nacional de Ciência e Tecnologia para Excitotoxicidade e Neuroproteção (INCTEN/CNPq).

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  1. Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

    Bernardo Assein Arús, Débora Guerini Souza, Bruna Bellaver, Diogo Onofre Souza, Carlos-Alberto Gonçalves, André Quincozes-Santos & Larissa Daniele Bobermin

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  1. Bernardo Assein Arús
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Correspondence to Larissa Daniele Bobermin.

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Arús, B.A., Souza, D.G., Bellaver, B. et al. Resveratrol modulates GSH system in C6 astroglial cells through heme oxygenase 1 pathway. Mol Cell Biochem 428, 67–77 (2017). https://doi.org/10.1007/s11010-016-2917-5

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